The HCDSB serves the communities of Burlington, Halton Hills, Milton, and Oakville, with the main Board office (Catholic Education Centre) located in Burlington, Ontario, Canada.

The Halton Catholic District School Board traces its roots back to 1856 when the founder Robin Smith and Father Morgan Rex-Ryan founded St. Mary's School – the first Catholic elementary school in Oakville to establish education programs for Catholic children in the town of Oakville.

Under provincial legislation,[1] separate school zones were later formed in Burlington, Georgetown and Milton.

Student trustees attend all regular board meetings, although their vote is non-binding.

All students are eligible to apply, with the exception of ninth graders as the application process ends the year before.